Physics 2005 Jamb Past Questions and Answers

Question 41 :

• JAMB 2005

\( ^{235} _{92}U + ^1 _0n → ^{144} _{56}Ba + ^{90} _{36}Kr +2X \)
In the reaction above, X is

A. Electron
B. Proton
C. Neutrino
D. Neutron

Question 42 :

• JAMB 2005

Two liquids L₁ and L₂ are contained in a U - tube. The height and the density of L₁ are 8 cm and 10³ kgm^-3 respectively. If the density of L₂ is 800 kgm^-3, its height measured from the same level is

A. 8 cm
B. 10 cm
C. 16 cm
D. 12 cm

Question 43 :

• JAMB 2005

10⁶J of heat is required to boil off completely 2kg of a certain liquid. Neglecting heat lost to the surroundings, the latent heat of vaporization of the liquid is

A. 2.0 x 10⁶J kg^-1
B. 5.0 x 10⁶J kg^-1
C. 2.0 x 10⁵J kg^-1
D. 5.0 x 10⁵J kg^-1

Question 44 :

• JAMB 2005

The figure above shows three capacitors, 2μF, 3μF and 6μF connected in series. If the p.d across the system is 12V, the p.d, across the 6μF capacitor is

A. 4V
B. 12V
C. 2V
D. 6V

Question 45 :

• JAMB 2005

If the distance between two point charges its increased by a factor of four, the magnitude of the electrostatic force between them will be

A. ¹/₄ of its former value
B. ¹/₁₆ of its former value
C. ¹/₂ of its former value
D. 4 times its former value